10 Dec
1998
10 Dec
'98
6:36 p.m.
At 08:36 PM 12/10/98 -0500, you wrote:
Compare:
o o o o o
to
o
o
o
o
o
o
o
o
o
Any difference jump out at you? Yep, the latter uses a lot more vertical
space. In a laptop, that translates into thickness. If you want a skinny
laptop, all your parts have to be thin.
As to five heads versus one, you can print five characters at once. Faster
printing.
--------------------------------------------------------------------- O-
Uncle Roger "There is pleasure pure in being mad
roger(a)sinasohn.com that none but madmen know."
Roger Louis Sinasohn & Associates
San Francisco, California http://www.sinasohn.com/
a little
'shuttle', spaced 5 characters apart in the same horizontal
line. A motor/scroll cam assembly wobbles this backwards and forwards
across the paper and moves the paper up one dot line for ever complete
May I ask, why do this when it's probably easier to use 9 vertically
aligned pins like the rest of the civilized dot matrix world? (Except for 
10 Dec
10 Dec
6:55 p.m.
Roger wrote, regarding the printer in the HX-20 and AIM-65:
As to five heads versus one, you can print five
characters at once. Faster
printing.
Disregarding the time spent moving the paper, it is slower (5/8 the speed),
since you are only printing five dots at a time rather than eight. But
speed wasn't the point.
When you include the time spend moving the paper, it is even slower. For a
line of text you have to move the paper the same amount with either method.
But with the five separate single-pin heads, you have to move the paper
precisely eight times, which typically takes longer than a single
less-precise move of 8x the distance.
The real win was just that the mechanism was cheaper than the more common
eight-vertical-dot mechanisms.
Eric
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